Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c6ba4d4c5c44db6397fd82f6cb2df84cf7f00f81bed98336877dc9fb4c255d6' 
  AND token = 'gJ67evbaQcoKPK12FRJcNxG7YAaqs/zbss4VKzAsjW0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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