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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30d86f337bcb981b00179407f08e8fc8d2ee2b24858b6347ce1b01a5411bb904' 
  AND token = 'qU8I1fnhxJQmS/xXAilVSXorX2921hc/BI20s/pbCvE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00094

JSON explain

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