Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f4071f62fcf49fbb52c361425c32531c0d67f773b126adea2f14dbfc97323ca' 
  AND token = 'pT85xPA0u3BeS87OES5jUu1/dGqEU6zYjwfJ1/lfviQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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