Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e85c24572872bde615314530380bdd0144b7ec23fae36934fbebaf3746dc39b7' 
  AND token = 'GQNByuN39gHMBhuonL+Ejvkb0cZ39uUdfqlEoMC1BBU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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