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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5cc29d08f36fd5c450f9fb96c3fd88aa860c49b0e93b31aca2236b80eb59068' 
  AND token = 'UdKJn6gP1AyPn2pjPalzO/YAt9iZ/C9X9D7T3mDngGA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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