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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3edd35e9b379ab3accd4865520cd64be5c35f790d2295b689321008926885397' 
  AND token = 'gEbYKF2FdPzxPCe7ZLkZL63J4kcnur+xIPTAYM/JIWg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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