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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82249c2a54bd85f7f306ae567cfd817581541efb2a7b587aa8bbc8e368ee944d' 
  AND token = 'rAp4oZoWcSul2/Su7+kxc6szwDGO+DYo7oCFXrbanBo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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