Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3a9e287a0b31f4f5c88ec368a76c8bf5a7a6f1a9a1f0de321dac9e1c28115f36' 
  AND token = 'EGk2Ug2mhagx4+zQNJV6duzyocMPfinHhic6bnad6T8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}