SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b72548e61f39504f769fc38c45193b216185c3eed7913ea35e5f2b8ba956fd73' 
  AND token = 'OMvDXVURyFPHY6mQ5utCoZLM2gTBjdtxmdYhNCpzWPk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}