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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '83c668272671dede2fdd500173bc3565ccdc6043967ac709b3e526a5ec2ee552' 
  AND token = 'gdt12DG7LYVgJMzwvgsDZOlcPHuFC1m1tuVeRPYzwcI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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