Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1ac57de5d8381fa561680c3d50fa0c97c081c3a231efd42c4c5d4316b0c00fc' 
  AND token = 'AEJ9WHWFf01HgH6BrBBNnz9B6KBvmmjlipod9Hr8D5A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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