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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7f32d446e3eb3765727b8954400f6d5d6a8c62b44dce4e1d69e3626483c840ce' 
  AND token = 'tiAM13jE0AYIq2qFMfZPA5Q5VYNSkDophZJMaR/M9+4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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