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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b22eeeebf92745f6b8b1427871c0c9adf3adfdb10d5e0d07eaac90fde62250e4' 
  AND token = '9SA3qeizsxyt2Vq8QyaeJJH2f7D/wCHGaM5JECj5dj4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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