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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7026e13601cfabd7f94bd640c3544b2e7671a4ce299da19810e5ed38a891952a' 
  AND token = 'qIhhacsNEJaSQcWKIu9Avqay7oH3hmtTWD3absUZwuE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}