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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a65df40f8c4b36a123014b1567e52ed1a65d4b6d20d18d5d5f9b45e4647ff63c' 
  AND token = 'jsZxnwAjLAEXMLYH/9N38qh3tZcajxOEHRPtaje7zMY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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