SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a14cf6cd76c834a1ba596ae5abc15b2fc1259159aaf11b22bf883fbb876336ba' 
  AND token = 'fMPZf09wKY20Y3WP61aKZmfF8z+KJljyBnleVratqhU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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