Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17f061a55cb67c040b96c06a9f93330a7a510cd66bba4f8ef480fdfff353b73f' 
  AND token = 'pPeGIrFmTUtCqc2llQlF57OUSIdwLVwwMfVzJkknePI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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