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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fda49c01cf45247a700dec453c150ca11771ce5aa98df133b9d6dc153a6ed55d' 
  AND token = 'W5J2fW8gDug0OMi8c9BIeUEEqppUYKk+sj+UE+h0ai8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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