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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d85e331c4bfb33327c8af33611691c660525f9c32512cab6e42b0ba8504ee61' 
  AND token = 'Y47Ai+sioyURw4GcIsFhaNswIeSKJpvldiEddQO8zr8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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