Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a172a7b66b18f342736e7bfbbb23eefeddb6ff77d45fef4452ecf7b5f2f7891' 
  AND token = 'MN19GgNymvn0eivPclhQxg11Kb/4AVmPDsugTnhBMlw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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