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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0bed6417f5d24ec16129cdd640f9431a6582eb0847550916199556ab22b96eb1' 
  AND token = '4Oxk6IAlF3ErxuQHIGYtA575gQX6I6OjDVPZsS3uUew=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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