Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c814b09ee264dacba89aad424b3c53704fa141350fa1f253a1ba4d2da0e9379' 
  AND token = 'chEMXkfxT0W9OTT4Vks4tCEwsk5lVxeS/lELv4CB584=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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