Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cf829e242cd48050014fa88a9659b0e300bf3b713888daf28f7268cf611cdbfa' 
  AND token = 'xKzUtp2lxU6x6TnT3Kl8qe9Bhrn7FsSMxDIb3yWWhZ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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