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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83045c91494d4bb539f8714e02e7a69834b1f4a355a5eb1251fe12d13a720c8d' 
  AND token = 'dvHpZbEmFpneE7FLqmP0ol+eWT2Bz3mx46lZ8f1xwJw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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