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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c97dfa0561f2bfb2d66b17ca8e7a352e661ec84fa091ab78aae81bc56d75425' 
  AND token = 'O+PXXHpQQ6FaM0YXcJjUq3Myue+xhWyTuEVxDmmplro=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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