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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '44618c33a74441053686f804ce8accc18def67ae34347975ac6dfa9fb6cd6cc3' 
  AND token = 'vA7cA6+mLdVKqd/gr+wiefMie5A+E9jtf2hzq2hWWdc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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