Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97faf013b4d0236523f12078fb01dc6dd5f60eff28e60cf551f877ee55a0a69a' 
  AND token = 'TmZixpn+AwmLPniNCRF7lTLR7x9s3TLk72AnCdV54/Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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