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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20fa6228803cdeac82238af88fb274a46b9dddbdcc12841e3c1968e8bb6075bb' 
  AND token = 'MPzpTKd0UEOrT9mGGoroJ6O+Yp3wVEPHPz7g32FTPwo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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