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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '54efc5f92a7e03d1b0afdf0495b33afc5d9321bf87511a2e6f8c754bbc7e6f8e' 
  AND token = 'rwODKJjGnDsZbA4nzPF8GL58ttTxE+0+7+RTpF1pROc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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