SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ec9ce07a0aedb6301a5f56d2b331600bc3d59b106bfa73b2d4c26f8870d074a6' 
  AND token = 'qR3uGqBZZ4NZr+bi/hSWojFUKPqyfOCYQp15/6FzbA4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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