Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f37c5174ac1737a73d08b6782fa5ef81ef6484758afc4f12254064a125ca38e' 
  AND token = 'jcP6CNch/YI2ekSWAMdiqF67y5wB1t9ruMvBEN2FEcI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}