Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e409e735b33146af8774341dfff2080e822950b0d5105f0b8432f7cc06e01508' 
  AND token = 'B8sB18+VB0/eVp2nU6UBZP68QxCDC/cjAZKccDYYYvM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}