Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6cf51a31d51eacb8ae7faef61272c589725e2f29ff949e4aa0a6320c09d28c20' 
  AND token = 'ExH+eTXfa+lkIOw1a7HJHUb4uUgcODGB8fLhgLE3xGQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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