Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '26e5fabf535619a860d1f0d7102b3dcc1c53cb2e8a52985614f569822ec17c18' 
  AND token = 'B1P+/jywN/Es/0Rb//MTeMRav+q5GCjIWoW9OYJk6Q8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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