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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd7a81c759c605994a7e3aca84c1cb79076d9d97ad05bf19374cf1a40bfd6a39' 
  AND token = 'tQ4dCZKz6FynFzw2Laos91wqu0h/1vUK880CIQ1AOR4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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