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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0217e0965c8c1f5f3a7ebb44c19c8849530f01d8478a490ef47e46a212bfbc2e' 
  AND token = '/8cCKFKujUnOS4OajQq7/HbW4xtDcIqfnTTle19HRjw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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