Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '182dab43226f54d3b9efac13f7ff196020b5fcbdd4858f6e3af344ad5541a136' 
  AND token = 'LDkmK6B4uh0sf+4Ji0TGRTYpNv+fw1U5JtkQqMis6+s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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