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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '52df345ae04b38629aca8e685202fd6d7c69612eb60c35b0e6fc9f9173af050d' 
  AND token = 'ngC/uXwPcaK2XxeLQShGV5U9n4zeIog7Rr57XFpm7dc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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