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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd95b9331036cf8e3f5bfd9935628031a10fa6c47144c4ce8289bcb16544dbade' 
  AND token = 'LwU/RS6ZXLZglmgAI4DP8C0VedLuNMyeqiZ46XI2l2o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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