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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ffa59ecc0dac68c588f14716ba9d22a4e190425f9d60c3bb800e5a35e717509e' 
  AND token = 'ZRY08Zby9dZHXgwq/Jc5t8w7Us5mZCnSygPs/kL6lzk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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