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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'adde6ce3c3f9d93a87108cd75794e12f338696ba4b4e20a395028bf75bfe7902' 
  AND token = 'F8olF2i49Qb2Hesiux1WqpqtutuqjZNAI6933MKgxo8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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