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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a014ad63952fad0a2b710611f89c0cf4de92c132a667c6b35855a96c4e18841' 
  AND token = 'JQGezecDYknfkU/jIO0GMmWNH2+8skgKMxhIYXkMlDI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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