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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b02801bc38bd8b44950fd60cc3879a995027938ac923d6b8de2b836c763b4a3' 
  AND token = '9VHEvSl0UM+8lpqHnbPexLh3wpQtuZq0GpgXm7s3PUU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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