Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e3bc651c0193283eae966ca200cc8ea7efb592f5f1d6ba067bb3ecebc755d8e' 
  AND token = 'RPyo2QiP+Ai+lUsK1x6B/HHuffnrNQmP3fIRXJy8b4s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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