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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0ebfaa9c619f5c6b7b7e437ed5b9e8b15c60bd9251db117188ab6891e33b05a' 
  AND token = 'qsRxr71PQMQP7t05/n9DusZaeMN5M/wd6h5bJaOlqf4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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