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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '707f72b302cc87f8fc45ab8efada9b2a0076c3c3b8b6f83485beb868ea69b51d' 
  AND token = 'SH2eUuC72hsH1B+RCq8f4D8k2Rqw0YeRtB1F/PyuUGU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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