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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13593f6ee0d5ba54ddff9fd81121ee0628a5ecc3cff926a4cf54ab815684fa96' 
  AND token = 'aHZcyI/8B2tmTXZ7QtNzz6w5u7J02KdnpibHWD2xV80=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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