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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab07e6ce33bc1519f38f876510a52a1b7deb40e3038ee3c61b3c44652315ef5a' 
  AND token = 'Ce2s9ZNd8kUP4iHipDuCkfIZkTnL2I9WasAVUr/Wyh8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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