Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '37f3de79e668351aac0a1f8340d94768b50ec74452acbe5add221908b52a887f' 
  AND token = 'W31ypi2juq5LrFZtT4jjWdq3FUimOgJj193zRoFIhDs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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