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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9922825f63c8a60d5963c56639ced7d081205af1f217599abc55497fabd3c12f' 
  AND token = '65ONEEddy6Q6Amyy6cu05wteJu4PD3ZjO1JVQ41ne/k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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