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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41f44a169417ef5d58d86950ec95eeca7340ba6f8e0ebd9ba6d149cc515e0147' 
  AND token = 'pqpfgq42y2WjoNkP5Y5iSLY1L3aCTVXZxFheEE3gDTU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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