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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cdeb319497f0fe46e4cd4b5f258d8a538df344917bd85d33a4619366894fa81a' 
  AND token = 'C0i/CvdpFWVdAaAt/HpvlWBMhJipIU9qSKbGokQiE+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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