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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bfc11e124a6e0f3d7320d7cf5c5ecf8f9a2d27c622b28ae60c05d9a1ee4cc9d1' 
  AND token = 'nyAQJsflajNKGqF9HtDUGaVc2SA7dM4H93yyTzfv1oU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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