Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6152c27ab3fcc414c20c001c54f0d2544ce28ec2f82d7f1801b4f615bd21bda0' 
  AND token = 't5uGu54NaqKCfCEirZgvhybORKOOOT87uDq1DU0OLU8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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