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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '06e5620d62fab4bf543e1ed066c03dc9a58d78701676cc91ed39d008ba2c9568' 
  AND token = 'iWulGaIC5IaMBSACNqagmUO4XVkKtU5q6mOHgFHhNb4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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