Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c56f70d67e69324591710725612f381ecb117c341ac56e1aa37e93198903446' 
  AND token = 'p+jINDDiYTsZpzZ7OKnU46/xmPidqD7AsDcKEvPP0xE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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