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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '130969aa8eb4dc5c27e2cbed26a150476be9d02a7cf437575a51658f43b88ece' 
  AND token = 'Q3fPqCrOJSEooPr/8zTHKkAXZKBL5fCp72DFsdoh0io=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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