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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32a372c0c6b6d113c58c1bfc875f1f816aae0ee9f743b0540623220258ffbd07' 
  AND token = 'IUj0dm1BtE93kpJh58xBPzRP0/jtLeYFcXmp+CM9Osc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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