Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5326d036eab25cba188ff9fe0b14aeb8f60b83dd4916908474f2a2719fdb46ed' 
  AND token = 'wrzeXbSHG80dyQJ9sNOCJn9Xs+G00TQs6ipa9CAB/5Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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