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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f52f2c89c8e7c938580d70689b3e84ff3b6824abfc7ef3417dbd37f17bdf6bec' 
  AND token = '0D1WsMEWzNm/LX1y0hAUHWBu5y5rGla9sWh/eoS8xy0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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