Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4675062db331636d03bce8dc21ba1c8b2001f4c20e27b0d94b952731799d111b' 
  AND token = 'OCqzaNT+5ppKciHNZWnkupCfv44X+5J2kz5pNHXIqyE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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