SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7497123d46bc9a56573efe4195ab3d1ee3a0b005a9f5f652c87ab2d8d2fb8056' 
  AND token = 'CKI/69uq9SZq+On6JtNH0spnvEczLt+Vqh0bEOh0mYw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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