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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '73c95cda7ec4b944fdd1eb3eefc93b180da336ec54fc12a13e02f7b757eccb26' 
  AND token = 'ptzGu68wN7pyHey1umOhg+uZdnZ04S3hCZ68f3RTCTo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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