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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef9cc2f76438f17285a5e136ed642ba26ac8819865b048945f24382e92e092d9' 
  AND token = 'WogTgtq9w6cQ1JMMpNBW6iyRY6Rfz5WIWkf7z7pUzRw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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