Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a6e4cf20420c9498a63f1eebe974e3aafa6949c36de6399797bffd2a6120aa6e' 
  AND token = 'BYPHK7LaPKvcg87BPnZvmNwWHxe/mYaNpqSOPXu7/r8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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