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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca8e5a07e8238f1d98131351012ac7ff447208f58c03c56cbf571bd5c5ad4129' 
  AND token = 'kdH5NSOIkHD3hO0J87mZUKS/zYoxkgqfiobI6Qp6xPo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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