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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05097f1054303230d83074b61b8beea6f98bb70de0eac229264ce223a8992633' 
  AND token = 'tHI4YN+Kk8wS8dcy/vEay6yOr7t5MY8Io2kRZHPJuQU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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