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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cfdaa30149a5451f82f14f0ff74db3209fae23a8733cf834aab3e9dffe4ea292' 
  AND token = 'jJzNRbXeuv8ofPOGqDEmy/uKdCgP2fRMK51PnG7G9aA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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