SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02d1c34d5133cdbe877ea24089d68a0d6f979696695c5caf72f913eace3e0d55' 
  AND token = 'wnDPHB4IzZjUwPilaoVLNr0yYO/NVxmns8Z12M1+G4g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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