Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1284d29fc607b941b49c97d274b000627438f9439c9ff8380aa115253a2ba7b8' 
  AND token = '7BFMNzzJDcLJI5ou/vOGOHIuWxLJzsQSQpv507IsS6I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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