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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a467697bd0dd54986851bed43d737ea855811f9fa1499901c3d5a6dca1a2b809' 
  AND token = 'JYzGwT/uHex6QOQdKeMGZbNitx8Hxs5/PmSJnje3uGQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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