Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e789d72a713ad030eb6139b0e2761193c89d138dcb1331f663a57f6132eff84b' 
  AND token = 'm9CirzHPn7KKyCmVMglpLGAmSXQWmqorBWca+n1Pz3w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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