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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7a628807398471a1d2d29b8faf30a98ffe4f2a05c54d90cc54ef54afcc410c6b' 
  AND token = 'CrY70l3+ktUOkKacb2tPi6Fl0egJTNq2UV7K7hFu6fY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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