Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '08f5b30ac4bd6b0ebd7b8652fcf7d657c09c86d48bdc4805319fdf7af609120a' 
  AND token = 'Gy0p1JOznhnpewxnySCXR0SjOrFnBhLWLxDPnY7zAuw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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