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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f854b202be43d0c72529a95af9c17083086b447a632df8687bc12a93e508198f' 
  AND token = '0JJ9/QbRaPiCoAakZQ3msQJn2qVADVZ4QlL6WkB/CVw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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