Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f7753d3660c4624e0fbb65a09954727785d64302109c24d02df4e7049b8b492' 
  AND token = 'iQTMNOU4EzcrL5RlgDW5ACriTM18aK76Yjd0bjZcW+I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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