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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd9bb6f07d463f79836a4cd2185ab4da22f7b5fd6c7dbaacbb9ba3482730775df' 
  AND token = '650uYG1Ta1deHvCdRuabNFJ/8imCCV2a+pwBz29EB44=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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