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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9636672588486b3c5cf7c3190fbadaa7a891f8433c98b9750b95e9ff9e953b9c' 
  AND token = 'SX7f0tCu0nRN/D63ci/xXPyOKDqVOY/VYlvSjLR913c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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