Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a50dd966c602581ed0c19d17788f198ed55cf8f7846460777a867468de9fef2' 
  AND token = '/QdrLHGbAscsdxf0JUkv7vAglhIlsJA1Ub/VqyArpMM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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