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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7b66aa848d7b59dd6232c412181f4b43fd8e73402d006b8a5287d92b268ba2d' 
  AND token = '8KpOOzDzzDhDH6H+K9jYmt3TND2jcUU2HfhaK2YUcW4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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