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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d10043f69fd80ff30d58d855dc564efd69a4aacafe55c998fee79d9758a8d9d' 
  AND token = 'zyPrLQgi8f19QW6b5R6c1OeUrjTyG5iV6TSm3dtvB0s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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