Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8c0297d461cde593375fac6fcca396f65a695ab1af1cf6de7d76a176de819db5' 
  AND token = '8yXOAQliCJO3RiqR5p9V4R0u4EUjNWcs8eKUe3RNU9Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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