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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ad66e9e1f3f66d64f93fb6aa7f56bf1e61320192c2f9e41e3ec74d8c05064c0' 
  AND token = 'EGDZFjXRYnIrOZupP2gXODG+JxXdwKcTyEgT3fCDHTs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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