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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89eac043e5371471cb6678615d22f6793d3eb72eb2cc3571d4ec8b951a59c8ab' 
  AND token = 'J2Ze03mDQyGnx8qNCaNvoh889X1nHGyhJkKeqqQc0A8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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