SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8413b23d17d8b22f0e77184dfb41fd980601d3397b047ca9ba8db308353016c9' 
  AND token = 'Fy0ml/UXxjXgYAI5CfVTbSXhOJ7SfJ4bKudg/CB1kQM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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