SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8001d62bc7cf62231490ae9331e85b0fc683747f0371d3ef155af48f4fc1421c' 
  AND token = 'zwYzJtTW3Tq4GaljsBjtRLmHn/SYS4Px/21lapbGKd4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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