SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c591048332a7aed5f43842befbb72e49235b6b662de5cb2ed399685ae4c1bdb' 
  AND token = 'HOdzoFAcX4M5tzlKd+MykwwCDhbv/lpY1HBIVMLNK2I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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