Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '401f35fa707eea613a4adba3b3957f82d5aa5c21b0122b564d60784f9c22bba1' 
  AND token = 'ZduOAv422uWJmFvpriDnMDxTNXvP/YwYkC4NlEk1cvw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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