Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '835476ce2c0458f2fad424e097daa8f635bc57e2c8fea12497a90a0d72398dff' 
  AND token = 'QJDvu/kv4JvxUTHovQmmTi6US10aNhOcUpUAWXSmGds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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