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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4e5c82f46d9534dad6055a3dd4b063de9434a616f5a31345fdf2b1f0ec18901f' 
  AND token = 'ROHtaSkXWmxlEFpkNi8BapJizR2ElHHHdXPfBGNxQVs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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