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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '654fef4b3df24ab72cfeaf08fadba3cdc3066ed71afd76bb945cd3ed286804b5' 
  AND token = 'C8M2uuwgbW1QPm39az1v5MIovANUBIO53kzQUwaH95M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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