Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c8dbf3d769f0b296483dfc96f7a1ed51fa4e9dbfe609c2a631a2a7f1ff31187a' 
  AND token = '/qASNK9HWSSZJmY9uoyg5YNkPeChPzaiEVNuUbPoams=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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