SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2677c73389b3cd2f47c3a9b93a440876e1923835d5f95fe165c90bf07d30dcf0' 
  AND token = 'CQgM0Mv1bMCkWkpFX7QIRvIILNLpt/zZQ62UhBVhfHA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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