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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e85a3d5ec84b57e159988852229cc8de2e958c7c860c68117889b584bb20d2b' 
  AND token = 'ckUg4ASsOgi+WP0PvFJYO/RDhxq3VWfEYdJhn/rj2Gs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00105

JSON explain

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